Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5186721 | Polymer | 2006 | 15 Pages |
Abstract
Equations are derived to calculate the monomer addition programs for semi-batch copolymerization reactions that allow to prepare gradient copolymers and block gradient copolymers containing arbitrary, pre-defined compositional gradients along the polymer chain. An analytical solution is given for the special case of ideal random copolymerizations, and numerical calculations are applied to discuss non-ideal situations. Three classes of addition programs are proposed and discussed with respect to time efficiency. Time-linear addition programs are shown to be insufficient to generate perfectly constant gradients over the whole compositional regions.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Uwe Beginn,